Question

Find the rate of change of the height from age 8 to 16 and from age 60 to 80. Express both answers in units of cm per year, to two significant figures. Separate your answers with a comma.

Answer 1

Complete Question

The complete question is shown on the first and second uploaded image

Answer:

a

 $z = 6.25 \ cm/yr$

b

   $k = -0.25 \ cm /yr$

Step-by-step explanation:

From the first image  the rate of  rate of change of the height from age 8 to 16  

  is  mathematically evaluated from the graph as  

             $z = \frac{175 - 125}{16-8}$

            $z = 6.25 \ cm/yr$

From the first image  the rate of  rate of change of the height from age 60 to 80.

  is  mathematically evaluated from the graph as

             $k = \frac{175 - 170}{60-80}$

            $k = -0.25 \ cm /yr$